I feel for you. I have suffered bouts of this (BPPV) since I was pregnant with my first child 53 years ago. It is always lurking trying to happen so I avoid any movement which could cause an attack, like turning head quickly, looking up, and definitely no fairground rides
! I used to always carry Sea Legs travel sickness tablets, which helped a little.
The Epley Manoeuvre described by Dilemma can work for some, but I have never dared try it because I know how awful it will make me feel at the time. With tuition it can be carried out at home either on your own or with help.
If you type 'Labyrinthitis' into the Gransnet search box you will see previous threads on the subject, within which you will find many suggestions as well as sympathy!
Good luck!